YBa2Cu3O7-δ(YBCO) superconducting ring resonators with YBCO ground plane were fabricated. The resonators exhibit a high quality (Q > 104) at 16 K, indicating high potential for applications. In addition, from the analyses of the surface resistance Rs(T) and reactance XS(T), it was found that the derived London penetration depth λ(T) - λ(5 K) displays a linear behavior over a wide range of temperatures. The results suggest that a distinct line node feature in the gap function of a d-wave pairing superconductor may extend to temperatures higher than previously reported.
- Quality factor
- Ring resonator